Book description
This IBM Redbooks publication provides detailed instructions and scripts for managing failover and switchback in a WebSphere Replication Server for z/OS bidirectional Q replication environment for the z/OS platform. A typical business scenario is used to showcase the bidirectional failover/switchback implementation. This book also includes a WebSphere MQ shared disk and WebSphere MQ shared queue high availability scenario for the source system in a Q replication environment involving unidirectional replication. Key considerations in designing and implementing such environments are discussed.
This book is aimed at an audience of IT architects and database administrators (DBAs) responsible for developing high-availability solutions on the z/OS platform.
Please note that the additional material referenced in the text is not available from IBM.
Table of contents
- Figures
- Tables
- Examples
- Notices
- Preface
- Chapter 1: High availability concepts
- Chapter 2: WebSphere Replication Server Q replication overview
-
Chapter 3: Failover and switchback scenarios
- Introduction
- Business requirement
- Rationale for the bidirectional solution
- Environment configuration
- Failover and switchback considerations
- Controlled failover and switchback
-
Uncontrolled failover (UF) and switchback
- Uncontrolled failover (UF)
- Option A: Automatically resync primary and secondary servers (1/2)
- Option A: Automatically resync primary and secondary servers (2/2)
- Option B: Resync primary and reinitialize secondary (1/3)
- Option B: Resync primary and reinitialize secondary (2/3)
- Option B: Resync primary and reinitialize secondary (3/3)
- Option C: Resync secondary and reinitialize primary (1/3)
- Option C: Resync secondary and reinitialize primary (2/3)
- Option C: Resync secondary and reinitialize primary (3/3)
- Option D: Discard primary changes and reinitialize primary (1/2)
- Option D: Discard primary changes and reinitialize primary (2/2)
-
Chapter 4: WebSphere MQ shared queues and unidirectional replication
- Introduction
- Business requirement
- Rationale for the unidirectional solution
- Environment configuration
-
Setup of this environment
- STEP SETSHQ1: Set up connectivity between the databases
- STEP SETSHQ2: Catalog databases in the Replication Center
- STEP SETSHQ3: Create test tables
- STEP SETSHQ4: Create Q replication control tables
- STEP SETSHQ5: Create replication queue maps
- STEP SETSHQ6: Create Q subscriptions for the test tables
- STEP SETSHQ7: Set up WebSphere MQ on both servers
- STEP SETSHQ8: Start Q Capture and Q Apply on appropriate servers
-
Test cases
- Failover operations with no inflight automatic load in progress (1/4)
- Failover operations with no inflight automatic load in progress (2/4)
- Failover operations with no inflight automatic load in progress (3/4)
- Failover operations with no inflight automatic load in progress (4/4)
- Failover operations with inflight automatic load in progress (1/3)
- Failover operations with inflight automatic load in progress (2/3)
- Failover operations with inflight automatic load in progress (3/3)
-
Chapter 5: WebSphere MQ shared disk and unidirectional replication
- Introduction
- Business requirement
- Rationale for the unidirectional solution
- Environment configuration
-
Set up of this environment
- STEP SETSHDSK1: Set up connectivity between the databases
- STEP SETSHDSK2: Catalog databases in the Replication Center
- STEP SETSHDSK3: Create the test tables
- STEP SETSHDSK4: Create the Q replication control tables
- STEP SETSHDSK5: Create the replication queue maps
- STEP SETSHDSK6: Create Q subscriptions for the test tables
- STEP SETSHDSK7: Set up WebSphere MQ on primary and secondary
- STEP SETSHDSK8: Start Q Capture and Q Apply on primary and secondary
- Test cases
- Appendix A: Summary of code and scripts used in the scenarios
- Appendix B: Exception processing in a bidirectional Q replication environment
- Appendix C: WebSphere shared queues and shared disk overview
- Appendix D: Additional material
- Related publications
- Index (1/2)
- Index (2/2)
- Back cover
Product information
- Title: WebSphere Replication Server for z/OS Using Q Replication: High Availability Scenarios for the z/OS Platform
- Author(s):
- Release date: June 2006
- Publisher(s): IBM Redbooks
- ISBN: None
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